Correct Answer: Places of equal altitude

Solution : The correct answer is Places of equal altitude.

Contours are the imaginary lines used in cartography to indicate places of equal height or altitude. A contour interval is the difference in elevation between the contour lines. Three types of contour lines are

Correct Answer: 3

Solution : The error in this sentence is in part (R) marked by the third option.

Explanation: The subject "investment" is singular, so the verb "have" should be replaced with its singular form "has". Investment is a singular subject, so the verb "has" should agree with it

Correct Answer: helium is less denser than air.

Solution : The correct option helium is less dense than air.

A balloon filled with helium rises in the air because helium is less dense than the surrounding air. Helium is a lighter gas compared to the nitrogen and oxygen that

Correct Answer: Sad

Solution : The correct choice is the third option.

Explanation:
Glad means feeling pleasure or happiness. Therefore, the opposite of feeling happy or pleased is feeling sad, which means experiencing sorrow or unhappiness.

The meanings of the other words are:

• Keen: Having a sharp

Correct Answer: 6

Solution : Here, the sum of the numbers of the first and second rows is 16, so it should also be the same in the third row.

In the row one: 5 + 1 + 3 + 7 = 16
In the row two: 6 + 2

Correct Answer: Liveing

Solution : The third option is correct.

The corrected spelling is living. The incorrect spelling in the given word liveing can be fixed by removing the extra "e," and it means an income sufficient to live on.

The meanings of the other options are as follows:

Correct Answer: 279

Solution : Given:
a = 12(390)8; b = 7(134)5; c = 5(?)12

Square the sum of the first and third numbers and then subtract 10 from the resultant, to obtain the middle number –
Here, a = 12(390)8→(12 + 8)² – 10 = (20)² –

Correct Answer: No error

Solution : The correct choice is the first option.

The sentence contains no error and it conveys the intended meaning that the holidays will start in two weeks.

Therefore, the sentence is: "In about two weeks our holidays will start."

Correct Answer: 41,375

Solution : The present population, $P$ = 1,25,000
Increase rate, $r$ = 12.7% – 2.7% = 10%
Time, $n$ = 3 years
Total population = $P(1+\frac{r}{100})^{n}$
= $125000(1+\frac{10}{100})^3$
= $125000(\frac{11}{10})^3$
= $125000×\frac{11}{10}×\frac{11}{10}×\frac{11}{10}$
= $166375$
$\therefore$ Population increase = 166375 – 125000 = 41,375
Hence, the correct answer

Correct Answer: 92.16

Solution : Given,
36 equally efficient workers can paint 25 identical walls in 48 days.
⇒ One worker can paint 25 walls in 48 × 36
⇒ One worker can paint one wall in $\frac{48 × 36}{25}$
⇒ $\frac{1728}{25}$ days
⇒ 45 workers can paint 1 wall